Claude Sonnet 4.6 vs gpt-oss-120b
Head to head on 18 shared benchmarks, with price, context window, and release dates.
Benchmark scores
48evals · sort by any column, ⤢ to expand fullscreen
| Model | |||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Claude Sonnet 4.6 Anthropic | 65.3% | 78.0% | 1805elo | 79.9 | 79.7% | 11.2% | 42.4% | 78.4% | 80.0% | 76.1% | 63.9% | 77.7% | 86.5% | 86.4% | 44.1% | 77.1% | 42.4% | 78.9% | 87.1% | - | - | 47.2% | 47.6% | - | - | 1.35 | 1207elo | 51.0% | 32.4% | - | 92.2% | - | - | - | - | - | 89.3 | 67.7% | 72.1% | 45.0% | 46.6% | - | - | - | 76.3 | 50.6% | 60.6% | 51.5% | 62.8% |
| gpt-oss-120b OpenAI | 58.2% | 13.0% | 959elo | 35.8 | 67.2% | 5.9% | 58.3% | 51.0% | 60.2% | 38.8% | 50.3% | 48.6% | 68.9% | 39.2% | 36.0% | 71.6% | 5.3% | 45.0% | - | 41.8% | 66.7% | - | - | 38.9% | 7.6% | - | - | - | - | 57.6 | - | 70.7% | 1.62 | 1.53 | 80.0% | 77.5% | - | - | - | - | - | 97.9% | 26.0% | 65.6% | - | - | - | - | 49.6% |
2 / 2 models
| Attribute | Claude Sonnet 4.6 Anthropic | gpt-oss-120b OpenAI |
|---|---|---|
| Description | Claude Sonnet 4.6 is an AI model from Anthropic. | GPT-Oss 120b is an AI model from OpenAI, released with open weights. |
| Family | Claude | GPT |
| Params | - | - |
| Open weights | closed | open |
| License | proprietary | apache-2.0 |
| Released | 17 Feb 2026 | 5 Aug 2025 |
| Context | 1,000,000 | 131,072 |
| Input $/1M | $3.00 | $0.15 |
| Output $/1M | $15.00 | $0.60 |
| Cache read $/1M | $0.300 | $0.030 |
| Cache write $/1M | $3.750 | - |
| Speed | 45 tok/s | 186 tok/s |
| Latency | 1.12 s | 0.50 s |
| Modalities | text, image, file | text |
| Providers | - | - |
| Publisher | Anthropic | OpenAI |
| Reported scores | GPQA Diamond79.7% (AA) Humanity's Last Exam (HLE)11.2% (AA) IFBench42.4% (AA) SciCode44.1% (AA) τ²-bench (Tau²-bench)78.9% (AA) | GPQA Diamond67.2% (AA) Humanity's Last Exam (HLE)5.9% (AA) LiveCodeBench70.7% (AA) MMLU-Pro77.5% (AA) SciCode36.0% (AA) |
FAQ
- Is Claude Sonnet 4.6 or gpt-oss-120b better?
- Across the 18 benchmarks both models report on Sophon, Claude Sonnet 4.6 leads on 17 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do Claude Sonnet 4.6 and gpt-oss-120b compare on GPQA Diamond?
- Claude Sonnet 4.6 scores 79.7% and gpt-oss-120b scores 67.2% on GPQA Diamond.
- Which is cheaper, Claude Sonnet 4.6 or gpt-oss-120b?
- gpt-oss-120b is cheaper at $0.60 per million output tokens against $15.00 for Claude Sonnet 4.6 - about 25.0x.
- When were Claude Sonnet 4.6 and gpt-oss-120b released?
- Claude Sonnet 4.6 was released 17 Feb 2026 by Anthropic. gpt-oss-120b was released 5 Aug 2025 by OpenAI.
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